In my country mobile internet connections(3G,4G) have a monthly data limit(for example 4 gigabyte). So it is kinda dangerous to sync big files on the mobile internet connection. But I still want insync to keep my small document up to date even if i’m on a mobile internet connection (like a mifi hot-spot).

Possible solutions:
a) a file size limit if i’m on mobile internet
b) if i could choose which folders i want to keep up to date when i’m not on normal internet